JP2002028181A - Pants type diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pants-type disposable diaper having an excellent leakage prevention effect and capable of being manufactured at high speed. SOLUTION: An absorbent body for absorbing excrement and an exterior member forming pants are provided, and first elastic members are arranged on both side edges of the absorber body, and a front body side and a rear side of the exterior member are provided. On the body side, a second leg extending from the leg opening on one side to the leg opening on the other side through the crotch region.
A telescopic elastic member and a third telescopic elastic member are arranged,
The second and third elastic members are a pants-type disposable diaper having an arrangement angle of 30 to 60 degrees with respect to the diaper width direction when disposed along the leg opening.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper which is formed in a pants-type in advance. More specifically, the present invention relates to a pants-type disposable diaper that has an excellent leakage prevention effect and can be manufactured at high speed.

[0002]

2. Description of the Related Art In a conventional disposable pants-type diaper, a technique is known in which an elastic member is arranged along these leg circumferences so as to be in close contact with a wearer. For example, Japanese Patent Application Laid-Open No. 3-186
No. 263, the elastic member around the leg of the wearer is composed of a first elastic member in the first half around the leg and a second elastic member in the second half around the leg, and the first elastic member and the second elastic member are Intersecting disposable wear articles are disclosed. Japanese Patent Application Laid-Open No. H8-24291 discloses that the elastic member around the leg of the wearer is composed of a first elastic member in the first half around the leg and a second elastic member in the second half around the leg. There is disclosed a disposable wearing article in which a third elastic member is arranged in a separated portion of the member in the front-rear direction of the wearing article to form a leg-around elastic member.

[0003]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. Hei 3-186
According to Japanese Patent Publication No. 263, it is possible to cover the leg circumference without gaps,
Further, since the elastic member can be continuously arranged in the width direction of the diaper, there is an advantage that the elastic member can be manufactured continuously in the width direction of the diaper. However, in order for the first and second elastic members to cross each other, the respective elastic members must be largely moved and arranged in the vertical direction of the diaper, which is not suitable for high-speed manufacturing. In order to solve the above-mentioned problem, a method of arranging the first and second elastic members without intersecting each other has been considered. However, since the elastic members become discontinuous around the legs, there is a risk of leakage. is there. In order to solve the problem, a method as disclosed in JP-A-8-24291 is disclosed. However, when the diaper is manufactured in the width direction, a direction perpendicular to the first and second elastic members is used. However, arranging a separate elastic member on the production line places a burden on the production line and is not suitable for high-speed production.

[0004] The present invention solves the above-mentioned problems of the conventional pants-type disposable diaper, and provides a pants-type disposable diaper which has an excellent leakage prevention effect and is suitable for high-speed production. .

[0005]

SUMMARY OF THE INVENTION The present invention comprises an absorbent body for absorbing excrement, and an exterior member joined at least in part to form pants, and a front body of the exterior member. In a pants-type disposable diaper in which the opposite side edges of the back body are joined to form a waist opening and a pair of leg openings, and a stretchable elastic member is arranged along each of the openings. In the absorbent body, the first elastic member is disposed in the vicinity of both longitudinal edges of the crotch region, and the exterior member includes at least an outermost sheet disposed at an outermost position and an inner layer sheet disposed at an innermost position. A second stretch between the outer layer sheet and the inner layer sheet on the front body side of the exterior member, extending from the leg circumference opening on one side to the leg circumference opening on the other side through the crotch region. Elastic members are arranged, Between the outer layer sheet and the inner layer sheet on the rear body side of the exterior member, a third elastic member extending from the leg opening on one side to the leg opening on the other side through the crotch region is arranged. And the arrangement angle when the second elastic member and the third elastic member are arranged along the leg circumference opening is 30 to 60 degrees with respect to the diaper width direction. It is related to a pants-type disposable diaper.

Further, the present invention is characterized in that the second elastic member and the third elastic member are arranged discontinuously in at least one place in a region where the absorbent body is arranged. About pants-type disposable diapers.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The pants-type disposable diaper according to the present invention comprises an absorbent body for absorbing excrement and an outer member forming the pants, and the absorbent body has first and second side edges in the longitudinal direction. (1) a second elastic member extending from an opening around the leg on one side to an opening around the leg on the other side through the crotch region on the front body and the back body of the exterior member, respectively; And a third elastic member are arranged, and
The arrangement angle when the second elastic member and the third elastic member are arranged along the opening around the leg is 30 to 60 degrees with respect to the diaper width direction.

[0008] In the pants-type disposable diaper of the present invention having such a configuration, since the absorbent main body and the exterior member are formed in separate processes, the second and third diapers are formed on the continuous web forming the exterior member. When arranging the elastic member, if the angle arranged along the leg opening is 30 to 60 degrees,
Since the elastic member can be arranged at a high speed with a small mechanical load, the manufacturing speed can be improved. In addition, the combination of the first elastic member disposed on the absorbent body and the second and third elastic members disposed on the exterior member allows the elastic member to be disposed along the opening around the leg. When the shape is formed, the fit around the leg is improved and leakage is prevented.

The pants-type disposable diaper according to the present invention comprises an absorbent body for absorbing excrement and an exterior member forming the pants. In the present invention, the absorbent body is
It is generally formed from a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between these two sheets. Alternatively, a liquid-permeable top sheet and an absorbent body formed of an absorber may be formed. In this case, a liquid-impermeable body is formed between an inner layer sheet and an outer layer sheet forming an exterior member described later. A back sheet may be provided, or one of the inner layer sheet and the outer layer sheet may be formed of a liquid impermeable material.

In the present invention, the first elastic member forming a part of the elastic member around the leg is disposed in the absorbent main body in the vicinity of both longitudinal edges of the crotch region. The arrangement width of the first elastic member is preferably 5 mm or more, and if it is less than 5 mm, the effect of preventing excrement leakage is reduced, which is not preferable. Further, as the first elastic member, any elastic material can be used, but it is preferable to arrange a plurality of natural rubber or thread rubber. The first elastic member may be arranged linearly or may be arranged in a curved line. However, it is preferable to arrange the first elastic member in a curved line because the first elastic member can easily adhere to the circumference of the wearer's leg.

In the present invention, the liquid-permeable topsheet is formed of a hydrophilic or hydrophobic nonwoven fabric, woven fabric, porous plastic film, or the like, and is made of fibers of polypropylene, polyethylene, polyester, nylon, or the like, or fibers of these. Can be formed by a composite fiber or the like obtained by combining two or more types. In particular, composite fibers of polyester / polyester, polyester / polyethylene, and polypropylene / polyethylene are preferred from the viewpoint of strength, but are not limited thereto.

In the present invention, the liquid-impermeable back sheet can be formed of a liquid-impermeable film such as polyethylene, or a liquid-impermeable film bonded to a nonwoven fabric or a woven fabric. It is preferable to use a material having moisture permeability.

As the absorbent used in the present invention, those generally used in conventional diapers and other absorbent articles can be used. That is, a single-layer or multi-layer mat made of absorbent fibers such as cotton-like pulp and rayon, and a high water-absorbing polymer substance is uniformly mixed in each mat or arranged in layers between each mat, and the whole is It is formed by being covered with a hydrophilic sheet.

As the cotton-like pulp, chemical pulp sheet,
A fiber having a fiber length of 5 mm or less obtained by defibrating a waste paper pulp sheet, a mechanical pulp sheet or the like with a crusher is used. The pulp raw material is not limited to softwoods, but hardwoods, straws, bamboos, and kenafs are also applicable.

As the superabsorbent polymer, starch-based, cellulose-based and synthetic polymer-based materials are used. That is, a starch-acrylic acid (salt) graft polymer, a saponified starch-ethyl acrylate graft copolymer, a saponified starch-methyl methacrylate graft copolymer, a saponified starch-acrylonitrile graft copolymer, Saponified starch-acrylamide graft copolymer, starch-acrylonitrile-2
-Saponified acrylamide-2-methylpropanesulfonic acid graft copolymer, acrylic acid (salt) polymer, polyethylene oxide crosslinked with acrylic acid, crosslinked product of sodium carboxymethylcellulose, crosslinked polyvinyl alcohol-maleic anhydride reactant Things.

In the present invention, the exterior member is formed of at least an outermost sheet disposed on the outermost side and an innermost sheet disposed on the innermost side. If necessary, another sheet may be disposed between the two sheets. You may. Further, since the outer layer sheet and the inner layer sheet are directly in contact with the body of the wearer, it is preferable that the outer layer sheet and the inner layer sheet be formed of a soft and air-permeable material such as non-woven cloth. One may be formed of a liquid impermeable sheet. In addition, the exterior member, on the front body side and the back body side, respectively, between the outer layer sheet and the inner layer sheet,
A second telescopic elastic member and a third telescopic elastic member extending from the leg opening on one side to the leg opening on the other side through the crotch region are arranged. Thus, when the absorbent body is bonded and fixed on the exterior member, the first of the absorbent body is
The combination of the stretchable elastic member and the second and third stretchable elastic members of the exterior member forms the stretchable elastic member at the opening around the leg.

In the present invention, the second and third elastic members are preferably arranged at an angle of 30 to 60 degrees with respect to the diaper width direction when arranged along the leg opening. If the arrangement angle exceeds 60 degrees, the production speed is limited by a mechanical load, and the device is not suitable for high-speed production. On the other hand, if the arrangement angle is less than 30 degrees, the tightening force around the legs is reduced, and excrement is likely to leak. The arrangement width of the second and third elastic members is preferably 5 mm or more, and if it is less than 5 mm, the effect of preventing excrement leakage is reduced, which is not preferable. As the second and third elastic members, any elastic material can be used, but it is preferable to arrange a plurality of natural rubber or thread rubber.

In the present invention, the second and third elastic members can be arranged discontinuously inside the first elastic member in the region where the absorbent body is arranged. That is, after arranging the second and third elastic members in a continuous manner, cutting is performed in a region where the absorbent main body is arranged. In this case, all of the second and third elastic members may be arranged discontinuously, or only a part thereof may be discontinuous. Since the appearance of the region where the absorber of the absorbent main body is arranged deteriorates when the elastic member contracts, it is preferable to dispose the second and third elastic members discontinuously.

In the present invention, a stretchable elastic member is arranged in an extended state at the waist opening, and is adhered and fixed with a hot melt adhesive. As the stretchable elastic member, a urethane film, urethane thread, urethane foam, thread rubber, or the like is used.

Hereinafter, the present invention will be described in detail with reference to the drawings, but the present invention is not limited thereto. FIG. 1 is a perspective view showing a pants-type disposable diaper according to the present invention. In FIG. 1, a pants-type disposable diaper 1 is formed by forming a leg opening 4 and a waist opening 5 by opposing side edges of a front body 2 and a back body 3 of an exterior member by a side seam 6. An elastic member is arranged in each opening.

FIG. 2 is an assembly process diagram of the pants-type disposable diaper 1 shown in FIG. In FIG. 2, a second stretchable elastic member continuum 12 and a third stretchable elastic member continuum 13 are respectively disposed on the front body side and the back body side of the continuous web, and further, the waist elastic stretchable members are provided on both side edges of the continuous web. The continuous body 10 is arranged to form the exterior member continuous body 9. Separately, the absorbent body 8 is arranged at the center of the continuous web, and the first elastic elastic member continuous body 11 is arranged on both side edges to form an absorbent main body continuous body. After being cut, it is rotated 90 degrees and fixed at a predetermined position of the exterior member continuous body 9. Next, the absorbent body 7
The exterior member continuum 9 with the fixed is formed with an opening around the leg, folded at the center in the longitudinal direction so that the absorbent main body 7 is on the inside, and after joining the side seam portions, individually cut and A diaper is formed using the mold. in this case,
The waist elastic member may be disposed after the absorbent main body is fixed. It is also possible to arrange a belly circumference elastic member for tightening the circumference of the belly.

FIG. 3 is a plan development view of the pants-type disposable diaper shown in FIG. In FIG. 3, the pants-type disposable diaper includes an absorbent main body 7 and an exterior member 9, and is formed by joining and fixing the absorbent main body 7 to the exterior member 9. In the absorbent main body 7, an absorber 8 is arranged at a central portion in the longitudinal direction, and first elastic members 11 made of a plurality of elastic elastic rubbers are arranged at both side edges in the longitudinal direction. The exterior member 9 has a plurality of elastic elastic rubbers extending from the leg opening on one side to the leg opening on the other side through the crotch region on each of the front body side and the back body side. A second telescopic elastic member 12 and a third telescopic elastic member 13 are disposed.
When the second and third elastic members 13 are arranged along the opening around the leg, the arrangement angle (angle A) with respect to the diaper width direction is arranged at 30 to 60 degrees. Furthermore, the second
The elastic member 12 is arranged to intersect the first elastic member 11 at the first intersection 14 and the second intersection 15.
The third telescopic elastic member 13 is formed of the first telescopic elastic member 11 and the third telescopic elastic member 11.
The second elastic member 12 and the third elastic member 13 are arranged so as not to intersect each other at the intersection 16 and the fourth intersection 17. Further, at the position of the waist opening, a waist elastic member 10 composed of a plurality of elastic yarns is arranged.

FIG. 4 is an expanded plan view of the pants-type disposable diaper shown in FIG. 1 showing an example different from that of FIG. FIG.
In the above, the second telescopic elastic member 12 and the third telescopic elastic member 13 disposed on the exterior member 9 are connected to the first telescopic elastic member 11 attached to the absorbent main body 7 in a region where the absorbent main body 7 is disposed. Are arranged discontinuously inside the.

FIG. 5 is a plan development view of a conventional pants-type disposable diaper. In FIG. 5, the second elastic member 12 and the third elastic member 13 arranged on the exterior member 9 are shown.
Are arranged at an arrangement angle (angle A) of 60 to 70 degrees with respect to the diaper width direction when arranged along the leg circumference opening. By arranging the second and third elastic members at such an angle, the two elastic members can be arranged very close to each other along the opening around the leg, or can be arranged crossing each other. Although a sufficient leakage prevention effect can be obtained without the first elastic member as in the present invention, when manufacturing a diaper, the process of arranging the second elastic member and the third elastic member in the machine requires Load is imposed, and high-speed production cannot be performed.

[0025]

The pants-type disposable diaper according to the present invention is excellent in the effect of preventing leakage since three types of elastic members disposed in the opening around the leg fit well around the leg of the wearer. Furthermore, it is possible to manufacture the product stably at a high speed, and it is particularly effective when manufacturing a product having a large size such as a pants-type disposable diaper for adults.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pants-type disposable diaper according to the present invention.

FIG. 2 is an assembly process diagram of the pants-type disposable diaper of the present invention.

FIG. 3 is a developed plan view of the pants-type disposable diaper shown in FIG.

FIG. 4 is a developed plan view of the pants-type disposable diaper shown in FIG. 1 showing an example different from FIG. 3;

FIG. 5 is a plan development view of a conventional pants-type disposable diaper.

[Explanation of symbols]

 1: Pants-type disposable diaper 2: Front body 3: Back body 4: Leg opening 5: Waist opening 6: Side seam 7: Absorbent body 8: Absorber 9: Exterior member 10: Waist circumference expansion / contraction Elastic member 11: First elastic member 12: Second elastic member 13: Third elastic member 14: First intersection 15: Second intersection 16: Third intersection 17: Fourth intersection

Claims (2)

[Claims] 1. An absorptive body for absorbing excrement, and an outer member joined at least in part to form pants, wherein opposing side edges of a front body and a back body of the outer member. In a pants-type disposable diaper in which a waist opening and a pair of leg openings are formed by joining the elastic body and a stretchable elastic member is arranged along each of the openings, the absorbent body has a crotch region thereof. The first elastic member is disposed in the vicinity of both sides in the longitudinal direction, the exterior member is at least an outermost sheet arranged at the outermost, and an inner layer sheet arranged at the innermost,
Between the outer layer sheet and the inner layer sheet on the front body side of the exterior member, a second elastic member is arranged from the leg opening on one side to the leg opening on the other side through the crotch region. A third elastic member extending between the outer leg sheet and the inner layer sheet on the rear body side of the exterior member, extending from the leg opening on one side to the leg opening on the other side through the crotch region; An elastic member is arranged, and the arrangement angle when the second elastic member and the third elastic member are arranged along the leg circumference opening is 30 to 60 with respect to the diaper width direction. A pants-type disposable diaper characterized by a certain degree. 2. The device according to claim 1, wherein the second elastic member and the third elastic member are discontinuously arranged at least at one or more locations in a region where the absorbent body is arranged. Pants type diaper.